Nut-lock.



PATENTBD JULY 14, 1908.

A'. KUNAN.

I No. 893,081.

NUT LOCK. .Y APPLIGMIoN FILED APR.9.1908.

@vita ad UNITED STATES PATENT oEEroE.

ANDREW KUNAN, OF ROXBURY, MASSACHUSETTS.

NUT-LOCK.

To all whom it may concern:

Be it known that I, ANDREW KUNAN, citizen of the United States, residingat Roxbury, in the county of Suffolk and State of Massachusetts, haveyinvented certain new and useful Improvements in Nut-Locks, of which thefollowing is a specification.

The object of this invention is an improved and ingenious nut lock whichmay be readily applied to a peculiarly formed bolt to effectually retainthe nutl in position thereon against any accidental loosening movement,and which is thus particularly adapted for use in connection with railjoints or jarring machinery, or the like.

With this and other objects in view that will more fully appear as thedescription proceeds, the invention consists in certain constructionsand arrangements of the parts that I shall hereinafter fully describeand then point out the novel features thereof in the appended claims.

For a full understanding of the invention and the merits thereof, and toacquire a knowledge of the details of construction, reference is to behad to the following description and accompanying drawing, in which:

Figure l is a longitudinal section of my improved nut lock; Fig. 2 is aperspective view showing the parts in juxtaposition; and Fig. 3 is asection on the line 3f-3 of Fig. 1.

Corresponding and like parts are referred to in the followingdescriptlon and indicatedin all the views of the drawing, by the samereference characters. 1- l Referring to the drawing, the numeral 1designates a bolt with exterior threads, and 2 a nut working upon thebolt and arranged to be screwed up against the work, said bolt and nutbeing of the ordinary construction, except that the bolt is formed inits extremity with an outwardly opening socket 3, threaded oppositely tothe exterior threads and the nu't is formed in its outer face with aboss, the outer edge of which is under-cut, as indicated at 4a. f Ascrew 5, which is threaded oppositely to the exterior threads of thebolt 1, is engaged in the threaded socket 3, with its outer end securedto -or formed integral with a cylindrical cap 6. This cap is slightlylarger in diameter than specification of Letters Patent.

- Application filed April 9, 1908. Serial No. 426,092.

:patented July 14, 190s.

the boss of the nut, and is arranged tol incase the extremity of thebolt, with its edge abutting against the outer face of the nut, said capbeing slit in its marginal portion as shown, to form two diametricallyopposite tongues 7 that are bent inwardly into engagement with theunder-cut edge 4a, to anchor the nut and the' cap together.

In the practical use of my improved nut lock, any jarring movement thatwould tend cut edge, the tongues l7 of the cap 6 may be engagedtherewith, to anchor the nut and the cap together, no matter what thepositionof the nut may be after it has been screwed up against the work.l

In order to facilitate the removal of the cap, after the disengagementof the tongues from the under-cut edge 4a, the cap is preferably formedwith two spaced openings 8 which are arranged to render the capsusceptible of engagement with a Spanner or similar tool, so, as toconveniently rotate the cap, and effect the disengagement of theinterior screw from the socket.

From the above description, in connection with the accompanying drawing,it will be apparent that I have provided a simple, vdurable andeiiicient construction of nut lock, which is positive in action, whichmay be easily and cheaplymanufactured at a cost but slightly greaterthan that of the ordinary nut and bolt, and which consists ofcomparatively few parts that may be readily assembled.

Having thus described the invention, what I claim is:

The combination with an exteriorly threaded bolt formed in its extremitywith an outwardly opening threaded socket, of a nut mounted uponthe'bolt and formed on'its outer face with an annular boss having anunder-out edge, an interior screw Working in In testimony whereof I aHiXmy signature the socketl, and a cap Cslecured to the oioiter in presenceof tWo Witnesses. end of t e screw an arran ed to ear against the outerface ofthe nut? said cap be- ANDREW KUNAN' [L' S'] 5 ing slit to forni atongue that is designed to Witnesses:

be bent into engagement with the under-eut GOTTFRIED JOHNSON, edge ofthe boss. JOHN RALLOOH.

